I'm gonna need you guys help on this one: Have an ATX power source, so that can be replaced. Also have an available PCI slot, so it can accept the GeForce 9500 GT card. However, my current nVIDIA nForce 6100-430 is an integrated bus type, that is embedded within the Asus M2N68-LA motherboard. What I need to know is if my existing GPU has to be disabled first...before the new card is installed...and if so...how? Or does it matter anyways?